Examlex
How many permutations of the 26 letters of the alphabet are there that do not contain any of the following strings: LOP, SLOP, SLOPE, LOPE.
U.S./Canadian Border
The international boundary between the United States and Canada, stretching across North America and recognized as the world's longest undefended border.
American Merchants
Individuals from the United States engaged in domestic and international trade, playing a crucial role in the economic development and expansion of America, especially from the colonial period through the 19th century.
Trade With China
The commercial exchanges between China and other countries, encompassing goods, services, technology, and cultural products, pivotal for global economic dynamics.
Jefferson's Agrarian Vision
Thomas Jefferson's ideal of a democracy supported by the widespread ownership of small farms, valuing agrarian life as the backbone of the American economy and democracy.
Q1: Find a spanning tree of minimum cost
Q3: A local street vendor asks his customer
Q22: <span class="ql-formula" data-value="\text { Let } F
Q24: <span class="ql-formula" data-value="( 0 + x )
Q38: A graph with a Hamilton circuit but
Q40: The time that it takes a student
Q47: List all the positive integers n
Q65: Find the postorder traversal of the
Q86: If T is a tree, then its
Q100: <span class="ql-formula" data-value="\left( 5 ^ { 4